Santosh Kumar was shot at and injured by an unidentified man near Alalpatti railway crossing in Bihar's Darbhanga district, a police official said today.
The assailant fired on Kumar when the latter stopped the former to question his identity while patrolling the area on foot with other colleagues last night, Superintendent of Police (SP) Garima Malik said.
The SI suffered bullet injuries on the left side of his shoulder and was taken to the Darbhanga Medical College and Hospital (DMCH) where the attending doctors referred him to the PMCH at Patna, she said.
A case has been registered in this connection.
Kumar and other cops were patrolling the area in view of the Mayoral poll in Darbhanga.